The number m and 58 are additive inverses. Drag and drop 58 and m to their correct positions on the number line.

The additive inverse is a number, when added to another number, yields 0.

Its basically the opposite number ... same number, different sign.

so if the number m and 58 are additive inverses, then m = - 58 <==

because - 58 + 58 = 0